Ultraviolet/infrared absorbent low transmittance glass
AssigneeNippon Sheet Glass Co., Ltd.
InventorsHiromitsu Seto, Yukihito Nagashima, Isamu Kuroda, Shigekazu Yoshii
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Abstract
An ultraviolet/infrared absorbent low transmittance glass is formed of base glass containing 65 to 80 wt. % SiO2; 0 to 5 wt. % Al2O3; greater than 2.1 to less than or equal to 10 wt. % MgO; 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is 7 to 15 wt. %; 10 to 18 wt. % Na2O; 0 to 5 wt. % K2O wherein a total amount of Na2O and K2O is 10 to 20 wt. %; and 0 to 5 wt. % B2O3, and colorants including 1.25 to 2.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3; 0.001 to 0.018 wt. % CoO; 0 to 0.0004 wt. % Se; and 0.028 to 0.2 wt. % NiO, wherein the glass has a turquoise blue or deep green color.
Claims20
An ultraviolet/infrared absorbent low transmittance glass consisting of base glass comprising:
- 65 to 80 wt. % SiO2;
- 0 to 5 wt. % Al2O3;
- greater than 2.1 to less than or equal to 10 wt. % MgO;
- 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is 7 to 15 wt. %;
- 10 to 18 wt. % Na2O;
- 0 to 5 wt. % K2O wherein a total amount of Na2O and K2O is 10 to 20 wt. %;
- and
- 0 to 5 wt. % B2O3,
- and colorants comprising:
- 1.25 to 2.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3;
- 0.001 to 0.018 wt. % CoO;
- 0 to 0.0004 wt. % Se;
- and
- 0.028 to 0.2 wt. % NiO, wherein said glass has a turquoise blue or deep green color.
An ultraviolet/infrared absorbent low transmittance glass consisting of base glass comprising:
- 65 to 80 wt. % SiO2;
- 0 to 5 wt. % Al2O3;
- greater than 2.1 to less than or equal to 10 wt. % MgO;
- 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is 7 to 15 wt. %;
- 10 to 18 wt. % Na2O;
- 0 to 5 wt. % K2O wherein a total amount of Na2O and K2O is 10 to 20 wt. %;
- and
- 0 to 5 wt. % B2O3,
- and colorants without Se comprising:
- 1.25 to 2.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3;
- 0.001 to 0.018 wt. % CoO;
- and
- 0.028 to 0.2 wt. % NiO,
- wherein said glass has a turquoise blue or deep green color.
Dependencies are inferred from the claim text.